Passage - Non locking. Generally used on hall or closets doors. May be also be used on exterior doors with a deadbolt.

Privacy - Generally used on bedroom/bathroom doors and has a push button to activate lock from interior. Exterior has a pin hole for emergency unlocking.

Keyed Entry - Generally used on exterior doors, A key is required to unlock from the exterior.

Single Dummy knobs or levers are sold individually and are non functioning. Perfect for ball catch doors where a latch is not needed or as decorative trim. Surface mounted.

Dummy pairs come with 2 knobs or levers, 1 for each side of the door. Non functioning and are ideal for ball catch or double doors where a latch is not needed but where the look of a knob or lever is desired. Surface mounted all brands except Baldwin Estate (5/8" bore required) and Baldwin Reserve (2 1/8" bore required)